Mechanical movement.



G. H. HOLDT.

MECHANICAL MOVEMENT.

mwucmou FILED APR. 21. 1914.

Patented May 16, 1916.

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} WITNESSES THE COLUMBIA PLANOGRAPH c0. WASHINGTON, D. c.

G. H. HOLDT.

MECHANICAL MOVEMENT.

APPLICATION FILED APR. 21, 1914.

l ,1 83,380. Patented May 16, 1916.

3 SHEETS-SHEET 2.

THE COLUMBIA PLANOORAPH 310., WASHINGTON, p. C.

G. H. HOLDT.

MECHANICAL MOVEMENT.

APPLICATION FILED APR. 21, 1914.

1 18 38, Patented M 16,1916.

3 SHEE HEET 3- sane GEORGE H. HOLDT, F PEARL RIVER, NEW YORK, ASSIGNOR'IO DEXTER FOLDER COMPANY, OF PEARL RIVER, NEW YORK, A CORPORATION OFNEW YORK.

MECHANICAL MOVEMENT.

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Specification of Letters Patent.

Patented May 1%, 19115.

App1ication filed. April 21, 191 1. Serial No. 833,382.

To all whom it may concern Be it known thatI, GEORGE H. Honor, a citizenof the United States, and a resident of Pearl River, in the county ofRockland 5 and State of New York, have invented certain new and usefulImprovements in Mechanical Movements, of which the following is a fulland clear specification.

The present invention relates to improvements in mechanical movements ofthe intermittent grip or clutch type in which relatively movable drivingand driven members are connectedby frictional disks.

The primary object of the invention is to provide an improvedconstruction, combination andarrangement of parts with a view tosimplifying the construction and reducing the number of parts .andthereby providing a mechanism which will be more durable and efficient.

While my invention may be applied to various mechanisms, it ispeculiarly serviceable in connection with a power operated paper cuttingmachine in which a clamp is periodically operated to apply pressure to apile of sheets during the active stroke of the mechanism produced byfrictional engagement between two sets of friction disks, one set'ofsaid disks being keyed to a power transmission shaft, while the otherset of said disks is connected preferably by a ratchet mechanism with amember which receives power from any suitable source. In thisconnection, simple and efficient means are provided for relieving thepressure due to friction, during the return or inactive stroke, thusavoiding an unnecessary consumption of power and the removal of strainwhen the clamp is moved away from the pile of sheets.

In the drawings which show the preferred embodiment of myinvention,Figure 1 is a fragmentary side elevation of a paper cuttingmachine having my improvements applied thereto; Fig. 2 is a view atrightangles to Fig. 1 partly in-elevation and partly in section, showingportions of Fig. 1 on an enlarged scale; Fig. 3 is a section on the lineI1I1IT, Fig. 2, and Fig.

41 is a fragmentary section on the line IVIV, Fig. 2, looking in thedirection of the arrow, a portion of the disk 15 being shown inelevation from the left according to Fig. 2.

Referring more particularly to the drawings, in the preferred embodimentshown in the drawings, a crank arm 1 which is keyed to a shaft 1,receives its power from a mechanical train (not shown) and is pivotallyconnected at 2 with a link 3 pivoted at its upper end 1 to areciprocating rack bar 5. The rack bar 5 is formed with inwardlypresented guide flanges (not shown) which engage and operate upon thechannel track bar 6 which is secured to one of the side frames of acutting machine in suitable position to present the rack bar 5 with itsteeth in mesh with the teeth 7 formed on the outer and lower peripheralwall of a housing 8. Said housing is provided with a web portion 9 and ahub portion 10, said hub portion being journaled upon the hub portion 11of a segmental gear 12 which is keyed to a shaft 13 by means of a splineor feather 11. A plurality of friction disks or flanges 15 are mountedon the shaft 18 and forced to rotate therewith by engagement with thespline 1 1. The hubs of said disks or flanges are providedwith laterallyprojecting portions 16 which are spaced apart to permit the axialadjustment for regulating the pressure between said disks or flanges.Said hub portions constitute raceways for a plurality of rollers 17 uponwhich arejournaled other friction disks 18 between which and thefriction disks 15 are interposed annular washers or flanges 19 which maybe constructed of any suitable material, such as leather for developingthe required degree of driving friction, while at the same timepermitting relative sliding between the flanges 15 and 18 after thecompletion of the clamping movement. The peripheries of the disks 18 areprovided with ratchet teeth 20 which cooperate with suitable pawls 21which are journaled on pins or bolts 22 carried .bythehousing 9. From aninspection ofFigub, it will be seen that the pawls on each pin or boltare of different lengths. be noted that in the present embodiment thepins or bolts 22 are suitably disposed with respect to the disks 18 sothat there will always be two out of the six pawls which en-Furthermore, it will gage the teeth 20 and these two will be ondifferent pins or bolts. Thus according to Fig. 3, the rear pawl in theright hand pair is in engagement with a ratchet tooth while the frontpawl is about one third tooth pitch away from the tooth. In the centralpair of pawls, the nearer one is in engagement with a tooth while thepawl behind it is a third of the way down the next tooth. In the lefthand pair the near pawl is one-third and the far pawl is two-thirds downthe next tooth. It will be seen therefore that at no time will thehousing be moved in an anti-clockwise direction for more than one thirdof the tooth pitch before two pawls positively engage ratchet teeth.This construction therefore insures an even connection between thehousing and the friction disks 18, and also serves to eliminate lostmotion. Suitable and eilicient means for regulating the pressure betweenthe disks 15 and 18 may be provided by the sleeve 25 which is slidablelengthwise along the shaft 13 under the pressure developed by a nut 24which is threaded to the outer end" of the shaft 13. The sleeve 23constitutes a bearing for the shaft 13 within the hub 25 of the bracket26. At the same time it constitutes a bearing journaled for the hub 27which is connected by a web 28 with a peripheral flange 29, which issecured to and constitutes a part of the housing 9, being securedthereto by the bolts 22.

The operation of the improved mechanical movement will be understoodfrom this description in connection with a paper cutting machine. Thusthe crank arm 1 is rotated whenever the main clutch of the paper cuttingmachine is thrown into action by the operator. As said shaft rotates itmoves the rack 5 upwardly by means of the crank arm 1, causing the gearcase 8 to be rotated by means of teeth 7. As the gear case 8 starts torotate around the friction disks, the pawls 21 are thrown intoengagement with the ratchet teeth 20, thus serving to rotate thefriction disks 18 on the rollers 17 However, the friction between thedisks 15 and 18 will cause this movement to be transmitted to the shaft13 and gear or segment 12, which is geared to a rack 30 on the lower endof a rod 31, which transmits power to the paper clamp hereinbeforereferred to. The clamp will thus be brought down upon a pile of sheetsupon the table. When the resistance offered by the pile of sheetsbecomes sulficient to overcome the frictional hold between the disks 15and 18, said disks will slip relatively to each other. After the out hasbeen made, the crank arm 1 by completing its revolution, draws the rackbar 5 clownwardly, thus reversing the movement of the housing 8. On thereturn movement, the pawls 21 will permit the return movement withoutmoving the disks 18. In order,

however, to effect a reverse movement of the clamp to release the sheetson the table, a lug 32 is secured to the inner wall of the housing 8 andextends into an annular slot or recess 33 in one of the disks 15, theends of said recess providing spaced shoulders by the lug or projection32. At the end of the return movement, the shaft and clamp are thusreturned to their normal inactive position. The machine is thus relievedof the power that would otherwise be required for overcoming thefrictional resistance between the disks 15 and 18 on the returnmovement, by obviating the relative movement between said disks.

I claim: 7

1. A mechanical movement comprising relatively movable friction disks,an oscillatable housing therefor, one 'of said disks being provided withspaced shoulders, a lug carried by said housing to alternately engagesaid shoulders to provide limited relative oscillatory movements betweensaid housing and one of said disks, and means other than said lug andshoulders for effecting a positive engagement between said disk andhousing during the movement of said housing in one direction.

2. The combination with a shaft, a friction disk keyed thereto, a secondfriction disk frictionally engaging the first said disk, one of saiddisks being provided with an arcuate recess, a housing for said disksoscillatable about the common axis of said disks, a positive drivingconnection between said housing and said second disk in one directiononly, and a lug mounted on said housing, said lug being brought intopositive engagement with the end walls of said arcuate recess in theextreme relative positions of said housing and disk.

3. In a mechanical movement, a power transmission shaft, a gear keyedthereto and having a laterally extending hub portion, a sleeve movableaxially along said shaft, a rotatable housing having spaced hub portionsjournaled on said hub portion of the gear and said sleeve respectively,friction disks splined to said shaft and adapted to be forced togetherby the movement of said sleeve, said disks having spaced hub portionsproviding a raceway, rollers mounted on said raceway, a friction diskjournaled on said rollers and having its opposite walls respectivelyengaging said friction disks, a ratchet mechanism connecting the lastsaid disk with said housing, and a lost motion connection between saidhousing and one of the first said disks.

4. The combination with a shaft, of a plurality of friction disksmovable axially of said shaft but forced to rotate therewith, said disksbeing provided with laterally extending hubs spaced from each other toallow for axial adjustment, a plurality of bearing rollers bridging thespace between and lost motion means for returning the said hubs, otherfriction disks journaled' on shaft to initial position. said rollers andadapted to be engaged by the first mentioned disks, a rotatable housingGEORGE HOLDT' 5 for said disks, a ratchet connection for transWitnesses:

mitting motion from said other friction E. R. LYMAN,

disks to said housing in one direction only, F. S. COOPER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

